VIDEO: Coolant Temperature Sensor Diagnostics

Andrew Markel is the editor of Underhood Service magazine. He has been with Babcox Media for 15 years. He is a technician and former service writer and holds several automotive certifications from ASE and ­aftermarket manufacturers. He can be reached at [email protected]

If you have a vehicle in your shop with the fans running all the time, there may be a problem with the coolant temperature sensor. Andrew Markel explains. Sponsored by Bosch Automotive Service Solutions.